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Патент USA US3046523

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July 24, 1962
G. c. CROWLEY
3,046,513
DETACHABLE ELECTRICAL CONNECTOR
Filed Jan. 50, 1961
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United States Patent 6 ” ice
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3,046,513 7
Patented July '24, 1962
2
however, both- as to organization and method of opera- ,
3,946,513
tion, together with further objects and advantages thereof,
-
DETACHABLE ELECTRICAL CONNECTOR
7
‘ may best be understood by reference to the following
. description taken in connection with the accompanying
George C. Crowley, Purley, England, assignor to Gen
eral Electric Company, a corporation of New York
drawing in which:
Filed Jan. 30, 1961, Ser. No. 85,874
p
.
.
FIG. 1 is a partial perspective view of two halves of an
electrical connector in accordance with the present in
3 (Ilaims. (Cl. 339-91), ,
This invention‘ relates to detachable electrical connec
vention in disassembled relation;
'
.
FIG. 2 is a plan view of the connector with the two
tors, and more particularly tos'uch a connector with re
leasable locking means to maintain the two parts thereof 10 parts thereof in assembled relation;
in assembled relation and prevent accidental separation.
FIG. 3 is a partial sectional elevation'taken on the line
3—3 of FIG. 2; and
‘
'
.
.
A
While not necessarily so limited, the present invention
FIG. 4 is an end elevation of ‘the female portion of the
?nds particular application for electric bedcovers in
whichv a wired electric blanket or the like is ‘connected
Referring now‘to the drawing, the present invention is
through a multiconductor cable to a bedside control and 15
illustrated by way of example in the form of an electrical
to a power source. It is obviously desirable with vsuch
connector particularly suitable for an electrically heated
electric bedcovers to provide a removable electrical con
bedcover. The teaching of this invention, of course, is
nection between the body of the bedcover itself and the
remaining electrical components. ‘Ordinarily, such an
applicable to connectors of a similar type used for dif-,
electrical connector.'
'
'
r
v
'
electrical connector provides the‘ means for establishing 20 ferent applications' However, a connector for a bed
- electrical connection not only to the heating wires, but to
cover ‘must be relatively ?at and compact while offering
additional electrical connectors forming a part of the
electrical control system. Typically, the connector is
maintained at the‘foot of the blanket and involves-from
substantial safety from electrical short circuits or from
three to ?ve separate electrical connections.
‘
‘
accidental disconnection during use.
,
'
>
In the particular application herein disclosedy?veesepar
25 rate ‘electrical connections to the bedcover‘are contem
narily this connector is located between‘ the‘ mattress
plated. For that purpose, ?ve electrical conducting pins,
1, 2, 3, 4, and 5, are shown embedded in a two-piece di
electric connector member having a top'half 6 and a
and the foot of the bed. Thus, heretofore such connec
tors, in the interest of economy of space, haverelied on
frictional engagement to maintain the two parts of the
thermosetting plastic molded in ‘the proper con?guration
to receive the electrical conducting pins. This'po‘rtion of
connector assembled.‘ However, such. frictional engage
the connector may comprise‘ also a strain'relief' device
ment is not always sufficient in use and the blanket may I
adapted to be clamped torthe fabric of the bedcover or
One of the requirements for the electrical connector
is that it must occupy a minimum of space,"sincerordi
bottom half 7. Parts 6 and 7 may be, for example, of a -
blanket. As shown in FIG. 2, an enlargedflange 8 is pro
become disconnected from its, power supply, should'the
user, for example, tug or pull the blanket. Such ‘forces 35 vided for this‘ purpose in order to increase the area of
contact between the fabric material and the electrical con
tend to separate the electric power and control cord from
nector. While the bedcover itself has not been shown in
the blanket. Thus, there is a need forsornev positive
' this application, it will be readily understood by those
locking means to prevent the blanket from becoming dis
skilled in the art that the conducting pins 1 through 5 are
connected during use.
7 v
The object of the present invention is'to provide a 40 connected to‘appropriate circuit elements in the-blanket
compact detachable electricali'connec'tor, for’electrically
itself;
heated bedcovers or the like, with 'a' self-locking latch.
member for simplicity and for safety.
‘
'
'
'
'
1
_
1
1 and described ‘above is adapted to cooperate-with a
A further object of this invention is to provide such a
connector with the latch formed as a one-piece dielectric
'
The male electrical connector shown at the‘left of FIG.
45
Another object of this invention is to provide such a
detachable electrical connector with simpli?ed locking 7 ,
means to prevent unintentional disconnection;
Brie?y stated, in accordance with one aspect of this
female electrical‘connector assembly 9 as shown on the ,
drawings. This connector ‘portion also may be molded,
in two parts, upper half 10 and. lower half 11. A series
of apertures 12 through 16 (FIG. 4) are adapted to re;
ceive the conductor pins 1 through 5. Although not shown
in the present drawings, it will be understood that the
invention, a detachable electrical connector includes a 50 female connector 9 includes electrical connecting clips of
_ appropriate design to establish the desired electrical con
male member of dielectric material with electrical con
ducting means secured therein and with a projecting por- I, , nections between the two‘ halves of the connector. .The
tion ‘adapted to be engaged in an ' open-ended recess
upper and lower portions 10 and "11 'of ‘female connector‘
9 may also be secured togetherfin any appropriate fashion,
of the female portion of the connector. ‘The female
member includes, of course, a body of dielectric material 55 such as by the metal clips 17 and 18 shown in FIG.-2.'
As best shown byFIG. .1, the male connector member
and a series of mating electrical conducting means. ‘A
one-piece movable locking member for the two portions I
includes an end of appropriate size'and contour-‘to be .re- '
of the "connector is formed of 'a‘ dielectric materiaLiwith
ceived in the open-ended‘ recess 19 inthefemalecon- ‘
nector. Such an arrangement provides-a ?rm mechanical
,the locking member extending across the open-ended
60
recess of the female half of the connector. One end of
connection between the two parts whenwassembledwas'
shown in FIG. ‘2, and the electrical 'conductingportions
the'locking member is in the form of a push button ex
tending through a wall of the open-ended recess ‘of the _ ’ of the connector are. completely sealed-and protected-by
the dielectric material making up the body of each of- the .i i " '
female connector. ‘This same locking member includes
adetent engageable against a shoulder formed on the '
In addition, the locking member ‘is 65
formed with one or more integral ‘resilient arms engaging
male connector.
the internal wall of the female connector to bias the lock
ing member in a direction to secure the two halvesof the
connector in assembled relation.
,
' ‘
connector
Connector
halves,
assemblies as thus
r 1 far describedhave
V .. . been
heretofore used in connection with electric blankets andv
the like. A similar connector is disclosed and} claimed,
for example, in Bliss etal. US. Patent 2,728,061, issued ,'
December 20, 1955, and assigned to the General Electric
The subject matter which I regard as my invention is 70 Company, assignee of the present invention. While such
particularly pointed out and distinctly claimed in the
a connector construction will normally remain in en-. 7
concluding portion of this speci?cation. My invention,
gagement by friction after proper assembly, it has been ; ~
3,04,55,51?’
found in practice that occasionally the two halves of the
connector will become separated during use. In accord
ance with the present invention, a simpli?ed locking ar
rangement is provided which can, however, be released
when desired.
As best shown in FIGS. 1 and 4 of the drawing, a one
piece locking member 20 of dielectric material is mov
ably mounted in the female half of the connector assem
A
A particular signi?cance with respect to the present
invention is the use of a one-piece member of dielectric
material guided for motion within the body of the con
nector and operable to latch the two halves of the connec
tor together. This integral member offers substantial
economy in manufacture, and at the same time presents
a structure offering a minimum risk of any electrical short
circuit within the connector. By molding this one-piece
or integral locking member from a resilient and ?exible
bly. As shown, this locking member 26. includes a push
button portion 21 projecting through an aperture in the 10 thermoplastic material such as nylon, the natural resil
iency of the material allows it to function not only as a
wall of female connector 9. Locking member 2% ex
locking plate but also as its own spring.
tends across the open-ended recess in connector half 9
While the present invention has been described by refer
and includes on the side opposite the push button a detent
ence to a particular embodiment thereof, it is to be under
or latch portion 22. The locking member 20 is effectively
anchored in position within the female connector, since 15 stood that various modi?cations may be made without
departing from the invention. It is, therefore, the aim
the push button end 21 is engaged in an'opening in the
in the appended claims to cover all such equivalent
connector, while the opposite end 23 (FIG. 4) is receiv
able in a recess 23' in the wall of the connector.
This locking member 20 cooperates with the male half
of the connector to hold the two halves securely fastened
together. For this purpose, the male half of the connec
tor is provided with a shoulder 24 adapted to‘ be engaged
by the locking detent 22. As a practical matter, shoulder
variations as come within the true spirit and scope of the
foregoing disclosure.
I claim:
.
l. A detachable electrical connector comprising a male
member having a body of dielectric material and a plural
ity of conducting pins extending therefrom, the body of
said male member also including walls de?ning a lock
shown by dotted lines in FIG. 1. In addition,v the male 25 receiving recessed area, a female member having a body
of dielectric material with a plurality of apertures to
connector half may provide guide means for the reciprocal
receive said conducting pins and walls de?ning an open
movement of the locking member 20‘. As shown in FIGS.
ended recess to receive an end portion of the male con
1 and 4, the locking member may include an elongated
nector body, a one-piece locking member extending
aperture 26 adapted to receive the projecting pin 3. In
across the recess of said female member with at least one
addition, the side walls of the locking plate may be guided
end thereof projecting through the wall of said female
by conducting pins 2 and 4. With this arrangement, there
member to provide push button locking release means, a
is little chance that the locking plate can become canted
latch portion integral with said locking member within
or jammed. The entire locking plate is, of course, made
the end recess of said female member on a side opposite
of a dielectric material such as nylon,‘ and thus there is
24 may provide part of a latch receiving recess 25 as
no danger of an electrical short circuit within the assem
bled connector.
While self-locking electrical connectors have been pro
vided heretofore in the electrical art, it has been common
practice to rely on the resiliency of one or more metal
said push button to engage the locking recess in said male
member, and ?exible arms on said locking member engag
ing an internal wall of said female member biasing said
locking member in a direction to engage said latch portion
in said locking recess.
ment as shown herein, any metal parts Within the connec
tor present a de?nite risk of electrical short circuit.
plastic material.
engagement. As shown herein, the resilient means com
pn'ses one or more ?exible arms, two such arms 27 and 28
tion of said male member, a female member of dielectric
material with walls de?ning an open-ended recess to re
arms with relation to the connector is such that locking
in, said locking member having edges guided by sliding
plate 20 is biased upwardly with respect to the position
shown by the drawings; or, in other words, the locking
forming part of said locking member extending thru the
2. The combination of claim 1 in which said one-piece
springs to bias the locking detent into engagement with 40
locking member is molded integrally of a resilient thermo
the locking shoulder. However, with a locking arrange
3. In a detachable electrical connector, 21 male member
of dielectric material having a plurality of electrical con
Therefore, in accordance with the present invention, the
locking member 20 of dielectric material is formed with 45 ducting pins secured therein and including a projecting
portion, a lock engaging shoulder on the projecting por
integral resilient means to bias it into positive locking
being shown in the illustrated embodiment. These resil 50 ceive the projecting portion of said male member and
having mating electrical conducting means therein, a one
ient arms, as clearly shown in FIGS. 1 and 4, extend out
piece movable locking member of dielectric material ex
wardly and engage the inside wall of the open-ended
tending across said open-ended recess and anchored there‘
recess in the female connector. The con?guration of these
engagement with at least one of said pins, a push button
wall of said female member, at least one resilient arm
detent 22 is biased into the locking recess 25 for securing
integral with said locking member engaging the wall of
the two halves of the connector in assembled relation.
said female member to bias said locking member in the
As best shown in FIGS. 1 and 3, the outer surface of
the locking detent is beveled as shown at 29 in FIG. 3. 60 locking direction and a locking detent forming part of said
locking member engageable with said locking shoulder.
Thus, when the two connector halves are pressed together,
the locking detent is automatically cammed downwardly
against the resiliency provided by arms 27 and 28. When
the connector halves are fully assembled, the locking
detent 22 snaps into recess 25, and shoulder 24 on the 65
male half of the connector thereafter prevents any acci
dental disengagement. The connector may, however, be
disengaged at any time by depressing push button 21, upon
which the entire locking member 20 moves downwardly
and the locking detent 22 then becomes clear of shoulder 70
24 and the connector halves can be separated.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,648,518
1,818,409
2,035,832
Werner _______________ __ Nov. 8, 1927
Lebennan ____________ __ Aug. 11, 1931
Parkin _______________ _._ Mar. 31, 1936
2,895,119
Montgomery __________ .._. July 14, 1959
580,821
Great Britain _,-..__ ____ ___ Sept. 20, 1946
FOREIGN PATENTS
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